Last Updated 11/4/2020 		 
  ASCE 7-16 FORTIFIED™ Wind Uplift Design Pressure Calculator
for Residential Roof Coverings (2:12 or Greater)1,2,3 		 
                         
        Mean Roof Height (ft) =
             
        Gable or Hip Roof =
             
         Design Wind Speed, Vult (mph) =
             
        Exposure =
             
                         
          Wind Uplift Design Pressures (psf):               
           Refer to FORTIFIED Standard Detail F-G-2    
           below for locations of Zones 1,2, & 3      
                     
Notes:                        
1.  Wind uplift design pressures provided are Component and Cladding (C&C) ASD pressures acting away from the roof surface based on the 2018 Wood Frame Construction Manual (WFCM) Table 2.4 and ASCE 7-16 Figure 30.4-1.  Minimum pressures for FORTIFIED correspond to Vult = 130 mph with Exposure C.  
 
 
 
2. This design aid is intended to be preliminary guidance for section R905.1 of 2018 IRC for use with the FORTIFIED Home Program. Design pressures must meet or exceed local code requirements. This aid does not supplant the need for drawings or plans to be reviewed and signed by a professional engineer.  
 
 
 
3.  Understanding design pressures is critical to selecting and installing roofing materials to comply with the IRC and the FORTIFIED Home program. Refer to FORTIFIED Technical Bulletin FH 2020-01 for additional guidance.